... low pressure air conditioning system 低压空档统 low pressure concrete 低压混凝土 low pressure hot water system 低压热水供热系统 ...
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Concrete low-pressure sewer pipes 混凝土低压排水管
Through economic analysis, the static and dynamic conditions to install low pressure economizer were obtained and the concrete calculation method and the incoming were provided by an example.
通过经济分析，得到了可以加装低压省煤器的静态及动态条件，并以实例说明了具体的计算方法及所取得的收益。
As the prices of raw materials, while the sales prices in the wake of rising competition in the market slow, low-profit status in the concrete industry, a certain pressure to the company.
由于原材料涨价、而销售价格因市场竞争上涨缓慢，混凝土产业处于微利状态，给公司带来一定压力。
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